Many radios are dubbed ‘kitchen radios’ solely for the reason that this is the room they end up getting most of their use in. Roberts has gone the whole hog and designed a radio specifically for kitchen use.
The first thing to note about the RDK-2 is that not only is it designed for the kitchen from a functionality perspective …

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Or because...

An analogue radio is essentially a few transistors and maybe a simple IC or two thrown together with the odd resistor and capacitor as glue. A DAB radio is to all intents and purposes a miniature computer bolted on to a conventional tuner, and whilst they are still a bit over-priced, it will pretty much inevitably always be a bit more expensive than its analogue counterpart.

Mind you, Roberts radios of any flavour don't tend to come cheap, so a lot's in the name. For affordable and stylish DABs, look to Intempo and the like. Rather like with "real" computers, you'll find there's actually only a very small number of people manufacturing the innards, and you may even end up with pretty much exactly the same radio in a different and more affordable case.